barnacle: Meaning and Definition of

bar•na•cle

1. any marine crustacean of the subclass Cirripedia, usually having a calcareous shell, being either stalkedand attaching itself to ship bottoms and floating timber, or stalklessand attaching itself to rocks, esp. in the intertidal zone.
2. a person or thing that clings tenaciously.

bar•na•cle

1. Usually,an instrument with two hinged branches for pinching the nose of an unruly horse.
2. spectacles.